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    • Effect of initial step height on headcut development in upland concentrated flows 

      Bennett, S.J.; Casalí Sarasíbar, Javier Upna Orcid (American Geophysical UnionWiley, 2001)   Artículo / Artikulua  OpenAccess
      Experiments were conducted to examine the effect of initial step height on growth, development, and upstream migration of headcuts in concentrated flows typical of rills, crop furrows, and ephemeral gullies. In a laboratory ...

    • Effective roughness modelling as a tool for soil moisture retrieval from C-and L-band SAR 

      Lievens, Hans; Verhoest, Niko E. C.; Keyser, E. de; Vernieuwe, Hilde; Matgen, P.; Álvarez-Mozos, Jesús Upna Orcid; Baets, Bernard de (Copernicus Publications, 2011)   Artículo / Artikulua  OpenAccess
      Soil moisture retrieval from Synthetic Aperture Radar (SAR) using state-of-the-art backscatter models is not fully operational at present, mainly due to difficulties involved in the parameterisation of soil surface ...

    • Effects of spatial sampling interval on roughness parameters and microwave backscatter over agricultural soil surfaces 

      Barber, Matías Ernesto; Grings, Francisco Matías; Álvarez-Mozos, Jesús Upna Orcid; Piscitelli, Marcela; Perna, Pablo Alejandro; Karszenbaum, Haydee (MDPI, 2016)   Artículo / Artikulua  OpenAccess
      The spatial sampling interval, as related to the ability to digitize a soil profile with a certain number of features per unit length, depends on the profiling technique itself. From a variety of profiling techniques, ...

    • Error in radar-derived soil moisture due to roughness parameterization: an analysis based on synthetical surface profiles 

      Lievens, Hans; Vernieuwe, Hilde; Álvarez-Mozos, Jesús Upna Orcid; Baets, Bernard de; Verhoest, Niko E. C. (MDPI, 2009)   Artículo / Artikulua  OpenAccess
      In the past decades, many studies on soil moisture retrieval from SAR demonstrated a poor correlation between the top layer soil moisture content and observed backscatter coefficients, which mainly has been attributed ...

    • Estimated and real durability of unfired clay bricks: Determining factorsand representativeness of the laboratory tests 

      Seco Meneses, Andrés Upna Orcid; Urmeneta, Pablo; Prieto Cobo, Eduardo Upna Orcid; García, Beñat; Miqueléiz Jiménez, Luis Upna (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      This paper presents an analysis of the representativeness of the main laboratory tests and the real dura-bility of earth-based construction materials. For this study, a natural marl soil, mixed with different per-centages ...

    • Evaluación de la producción de sedimentos y calidad de las aguas en cuencas agrarias de Navarra 

      Giménez Díaz, Rafael Upna Orcid; Casalí Sarasíbar, Javier Upna Orcid; Díez Beregaña, Javier Upna (Universidad de La Rioja, 2012)   Artículo / Artikulua  OpenAccess
      The Government of Navarre (Spain) established a series of experimental watersheds on different sites of its territory in order to assess the impact of the agricultural activities on the environment. Hydrological/meteorological ...

    • Evaluación multitemporal de métodos de corrección topográfica mediante el uso de imágenes sintéticas multiespectrales 

      Sola Torralba, Ion Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; González de Audícana Amenábar, María Upna Orcid; Torres Escribano, José Luis Upna Orcid (Asociación Española de Teledetección, 2014)   Artículo / Artikulua  OpenAccess
      En este trabajo se presentan los resultados de la evaluación multitemporal de varios métodos de corrección topográfica (TOC), cuya bondad se determina de forma cuantitativa mediante el uso de imágenes sintéticas multiespectrales ...

    • Evaluation of 2D models for the prediction of surface depression storage using realistic reference values 

      Giménez Díaz, Rafael Upna Orcid; Mezkiritz Barberena, Irantzu; Campo-Bescós, Miguel Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; González de Audícana Amenábar, María Upna Orcid; Martínez de Aguirre Escobar, Alejandro Upna Orcid; Casalí Sarasíbar, Javier Upna Orcid (Wiley, 2016)   Artículo / Artikulua  OpenAccess
      Depression storage (DS) is the maximum storage of precipitation and runoff in the soil surface at a given slope. The DS is determined by soil roughness that in agricultural soils is largely affected by tillage. The direct ...

    • Evaluation of a gully headcut retreat model using multitemporal aerial photographs and digital elevation models 

      Campo-Bescós, Miguel Upna Orcid; Flores Cervantes, J. H.; Bras, R. L.; Casalí Sarasíbar, Javier Upna Orcid; Giráldez Cervera, Juan Vicente (American Geophysical UnionWiley, 2013)   Artículo / Artikulua  OpenAccess
      A large fraction of soil erosion in temperate climate systems proceeds from gully headcut growth processes. Nevertheless, headcut retreat is not well understood. Few erosion models include gully headcut growth processes, ...

    • Evaluation of mechanical tomato harvesting using wireless sensors 

      Arazuri Garín, Silvia Upna Orcid; Arana Navarro, Ignacio Upna; Jarén Ceballos, Carmen Upna Orcid (MDPI, 2010)   Artículo / Artikulua  OpenAccess
      The harvesting of processing tomatoes is fully mechanised and it is well known that during harvest, fruits are subjected to mechanical stress causing physical injuries, including skin punctures, pulp and cell rupture. Some ...

    • Evaluation of risk factors in fatal accidents in agriculture 

      Arana Navarro, Ignacio Upna; Mangado Ederra, Jesús Upna; Arnal Atarés, Pedro Upna; Arazuri Garín, Silvia Upna Orcid; Alfaro López, José Ramón Upna; Jarén Ceballos, Carmen Upna Orcid (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), 2010)   Artículo / Artikulua  OpenAccess
      En el ámbito agrario se producen anualmente muchos accidentes mortales, no siendo todos ellos registrados oficialmente como accidentes laborales. El objetivo de esta investigación es comparar los datos reales y oficiales ...

    • Evaluation of surface roughness parameters in agricultural soils with different tillage conditions using a laser profile meter 

      Martínez de Aguirre Escobar, Alejandro Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; Giménez Díaz, Rafael Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Surface roughness crucially affects the hydrological and erosive behaviours of soils. In agricultural areas surface roughness is directly related to tillage, whose action strongly affects the key physical properties of ...

    • Evaluation of TOPLATS on three Mediterranean catchments 

      Loizu Maeztu, Javier Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; Casalí Sarasíbar, Javier Upna Orcid; Goñi Garatea, Mikel Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Physically based hydrological models are complex tools that provide a complete description of the different processes occurring on a catchment. The TOPMODEL-based Land-Atmosphere Transfer Scheme (TOPLATS) simulates water ...

    • Factors controlling sediment export in a small agricultural watershed in Navarre (Spain) 

      Giménez Díaz, Rafael Upna Orcid; Casalí Sarasíbar, Javier Upna Orcid; Grande Esteban, Ildefonso Upna; Díez Beregaña, Javier Upna; Campo-Bescós, Miguel Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; Goñi Garatea, Mikel Upna Orcid (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      It is recognised that the hydrological and erosion processes in watersheds are very much conditioned by the (inter)action of a number of variables. This paper covers a 15-year period of studying those factors that have ...

    • Generation of the site-adapted clearest-sky year of direct normal irradiance for solar concentrating technologies 

      García Ruiz, Ignacio Upna Orcid; Royo Romeo, Alberto; Torres Escribano, José Luis Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      Concentrating photovoltaic and thermoelectric solar facilities base their operation on collecting the direct component of solar radiation. Given that the direct beam that reaches the Earth's surface varies greatly in ...

    • Gully geometry: what are we measuring? 

      Casalí Sarasíbar, Javier Upna Orcid; Giménez Díaz, Rafael Upna Orcid; Campo-Bescós, Miguel Upna Orcid (European Geosciences UnionCopernicus Publications, 2015)   Artículo / Artikulua  OpenAccess
      Much of the research on (ephemeral) gully erosion comprises the determination of the geometry of these eroded channels, especially their width and depth. This is not a simple task due to uncertainty generated by the wide ...

    • Hallazgo de treintaiséis nuevas estelas de Navarra 

      Ukar Muruzábal, Jesús Upna (Gobierno de Navarra. Institución Príncipe de Viana, 1993)   Artículo / Artikulua  OpenAccess
      El presente estudio describe el hallazgo de 31 nuevas estelas de Navarra.

    • Hydrological signatures based on event runoff coefficients in rural catchments of the Iberian Peninsula 

      Taguas, Encarnación V.; Nadal-Romero, Estela; Ayuso, José L.; Casalí Sarasíbar, Javier Upna Orcid; Cid, Patricio; Dafonte, Jorge; Canatário-Duarte, Antonio; Ferreira, Carla S.S.; Giménez Díaz, Rafael Upna Orcid; Giráldez Cervera, Juan Vicente; Gómez-Macpherson, Helena; Gómez, Jose A.; González-Hidalgo, J. Carlos; Lana Renault, Noemí; Lucía, Ana; Mateos, Luciano; Pérez, Rafael; Rodríguez-Blanco, M. Luz; Schnabel, Susanne; Serrano-Muela, M. Pilar; Taboada-Castro, M. Mercedes; Taboada-Castro, M. Mercedes; Zabaleta, Ane (Wolters Kluwer, 2017)   Artículo / Artikulua  OpenAccess
      Hydrological signatures are indices that help to describe the behavior of catchments. These indices can also be used to transfer information from gauged to ungauged catchments. In this study, different approaches were ...

    • Influence of surface roughness measurement scale on radar backscattering in different agricultural soils 

      Martínez de Aguirre Escobar, Alejandro Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; Lievens, Hans; Verhoest, Niko E. C. (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      Soil surface roughness strongly affects the scattering of microwaves on the soil surface and determines the backscattering coefficient (σ 0 ) observed by radar sensors. Previous studies have shown important scale issues ...

    • Influence of surface roughness sample size for C-band SAR backscatter applications on agricultural soils 

      Martínez de Aguirre Escobar, Alejandro Upna Orcid; Álvarez-Mozos, Jesús Upna Orcid; Lievens, Hans; Verhoest, Niko E. C.; Giménez Díaz, Rafael Upna Orcid (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      Soil surface roughness determines the backscatter coefficient observed by radar sensors. The objective of this letter was to determine the surface roughness sample size required in synthetic aperture radar applications and ...
      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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